I have the SD mode on HD800. I do prefer HE1000 and Utopia over HD800 due to their tonality and bass.
Maybe also try Maxx134 Version 2.5 MODs at the other site, which IMO further improve he1k further. It offer slightly better treble, less laid back, better impact and similar staging. When I compared to he1k v2 at the store, I did prefer modded he1k v1, since v2 staging was still slightly more intimate (vocal seem more forward as well on v2).